Let me just say that my assumptions, irrespective of the data, are that the Nebulas are a nice way for SFWA members to log-roll each other, that the Hugo voters have long held noticeable collective biases that may imply cliquishness (the many nominations for Silverberg and Sawyer leap to mind), and that the SFSite poll seems to suggest more books I actually like, if only because it offers more options.

Anyway, here are the average Goodreads scores for novels that were Nebula nominees, Hugo nominees, and SFSite Readers’ Choice selections over the past ten years.